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12.85ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG581343784

Shape and cutting style on the report: Round brilliant

Certificate IGI LG581343784

Diamond specifications and retailer prices

From $2,757 NZD
£1,223 GBP
As of October 30, 2026
Save $11,999 NZD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $14,755 NZD at Adiamor · As of October 31, 2026
View at Adiamor

About this 12.85ct lab-grown round diamond

This 12.85ct lab-grown round sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG581343784 or 581343784. Listed at 11 retailers as of October 30, 2026, with prices from $2,757 to $14,755, a $11,999 spread on the same certified stone. Adiamor lists it at $14,755. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

12.85
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG581343784
Dimensions15.16 × 15.26 × 9.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
15.16 mm15.26 mm12.85 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG581343784
Side View
Table 57.0%Crown 34°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $14,755 NZD|Low: $2,757 NZD|High: $46,329 NZD|Avg: $11,868 NZD
Adiamor
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 6$2,757 NZD
Retailer 8$2,951 NZD
Retailer 13$3,423 NZD
Retailer 9$3,726 NZD
Retailer 12$4,020 NZD
Retailer 11$4,493 NZD
Retailer 7$4,831 NZD
Retailer 10$5,447 NZD
Retailer 2$5,900 NZD
Retailer 3$6,414 NZD
Adiamor$14,755 NZD
Retailer 5$34,031 NZD
Retailer 4$46,329 NZD

4 data points across 13 retailers

11 retailers$2,757 NZD to $14,755 NZD

A
Cheapest Retailer
-
$2,757 NZD
£1,223 GBP
A
Retailer 2
-
$2,951 NZD
$1,663 USD
View
A
Retailer 3
-
$3,423 NZD
$1,929 USD
View
A
Retailer 4
-
$3,726 NZD
$2,100 USD
View
A
Retailer 5
-
$4,020 NZD
HK$17,700 HKD
View
A
Retailer 6
-
$4,493 NZD
$2,532 USD
View
A
Retailer 7
-
$4,831 NZD
£2,144 GBP
View
A
Retailer 8
-
$5,447 NZD
€2,924 EUR
View
A
Retailer 9
-
$5,900 NZD
$3,325 USD
View
B+
Retailer 10
-
$6,414 NZD
$3,615 USD
View
Most Expensive
B
Adiamor
D-82828535 · Oct 31
$14,755 NZD
$8,316 USD
View
10 more retailers have this diamond
Prices start from $2,757 NZDSave up to $11,999 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
12.85ct Round
$2,757 NZD